Cosmetic applicator brush

Abstract

A cosmetic applicator brush is provided comprising a brush stem and a plurality of fiber arrays extending from the brush stem. The plurality of fiber arrays comprises at least a first zone defining at least a first pitch between adjacent fiber arrays located within the first zone, and at least a second zone defining at least a second pitch between adjacent fiber arrays located within the second zone, with the at least first pitch being different to the at least second pitch. The invention further discloses a method of manufacturing a cosmetic applicator brush, the method comprising using a stem pin to retain a multiplicity of fibers, in a primary twisting step, twisting the stem pin to form a twisted stem pin with a plurality of fiber arrays extending from the twisted stem pin, fixing a first region of the twisted stem pin, such that said first region is unable to twist further, the first region defining at least a first zone of the cosmetic applicator brush, the at least first zone in turn defining at least a first pitch between adjacent fiber arrays located within the first zone, and in a secondary twisting step, twisting a second region of the twisted stem pin to define at least a second zone of the cosmetic applicator brush, the at least second zone in turn defining at least a second pitch between adjacent fiber arrays located within the second zone, with the at least first pitch being different to the at least second pitch.

The invention claimed is: 
     
       1. A method of manufacturing a cosmetic applicator brush, the method comprising:
 using a stem pin to retain a multiplicity of fibers; 
 in a primary twisting step, twisting the stem pin to form a twisted stem pin with a plurality of fiber arrays extending from the twisted stem pin; 
 fixing a first region of the twisted stem pin, such that said first region is unable to twist further, the first region defining at least a first zone of the cosmetic applicator brush, the at least first zone in turn defining at least a first pitch between adjacent fiber arrays located within the first zone; and 
 in a secondary twisting step, further twisting a second region of the twisted stem pin to define at least a second zone of the cosmetic applicator brush, the at least second zone in turn defining at least a second pitch between adjacent fiber arrays located within the second zone, with the at least first pitch being different to the at least second pitch; 
 wherein the fiber arrays are trimmed between the primary and the secondary twisting step. 
 
     
     
       2. A method of manufacturing a cosmetic applicator brush, as claimed in  claim 1 , wherein the fibers of at least one of the first and second zones are retained in a uniform distribution such that a fiber density along an applicator brush length is constant. 
     
     
       3. A method of manufacturing a cosmetic applicator brush, as claimed in  claim 1 , wherein the fibers of at least one of the first and second zones are is retained in a non-uniform distribution such that fiber density along an applicator brush length is variable. 
     
     
       4. A method of manufacturing a cosmetic applicator brush, as claimed in  claim 1 , wherein the stem pin, in the primary twisting step, is twisted between 11 and 18 times. 
     
     
       5. A method of manufacturing a cosmetic applicator brush, as claimed in  claim 1 , wherein the stem pin, in the secondary twisting step, is twisted between 1 and 5 times. 
     
     
       6. A method of manufacturing a cosmetic applicator brush, as claimed in  claim 2 , wherein the stem pin, in the primary twisting step, is twisted between 11 and 18 times. 
     
     
       7. A method of manufacturing a cosmetic applicator brush, as claimed in  claim 3 , wherein the stem pin, in the primary twisting step, is twisted between 11 and 18 times. 
     
     
       8. A method of manufacturing a cosmetic applicator brush, as claimed in  claim 3 , wherein the stem pin, in the secondary twisting step, is twisted between 1 and 5 times. 
     
     
       9. A method of manufacturing a cosmetic applicator brush, as claimed in  claim 3 , wherein the stem pin, in the secondary twisting step, is twisted between 1 and 5 times.